(S)-N-(2'-amino-7'-methoxy-5H-spiro[oxazole-4,9'-xanthene]-2-yl)-2,2,2- trifluoroacetamide

(S)-5-chloro-N-(2'-methoxy-2-(2,2,2-trifluoroacetamido)-5H-spiro[oxazole-4,9'-xanthen]-7'-yl)picolinamide

(S)-2'-(cyclohexylmethoxy)-7'-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9'-xanthen]-2-amine

(S)-1-((2-amino-2'-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9'-xanthen]-7'-yl)oxy)-2-methylpropan-2-ol

(S)-2'-(2-methoxy-2-methylpropoxy)-7'-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9'-xanthen]-2-amine